If you had to create the config file manually some file/folder permissions are not right.
Your database name is most certainly not "mysql" …
The config file regarding the database looks like this (additional comment:
`
$conf['db_software'] = "MySQLi"; // database engine handler. "mysql" is deprecated so this if your server has it. See what setup suggests for alternatives as there are several options
/** for historical reasons these fields reference mysql even though the database **
** might be a different software **/
$conf['mysql_user'] = ""; //The database user to access the database
$conf['mysql_pass'] = ""; //The database password to access the databaase
$conf['mysql_host'] = ""; //The database host
$conf['mysql_database'] = """; // Name of the database to use
// If you're sharing the database with other tables, use a prefix to be safe.
$conf['mysql_prefix'] = "zp_";
`